Segment Disclosures Recon from Segment to Consolidated - Assets and Investments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 56,141		$ 56,141		$ 54,532
Current assets	3,221		3,221		2,661
Other Assets, Noncurrent	1,838		1,838		1,830
Operating Segments [Member] | Transmission And Gulf Of America [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Payments to Acquire Productive Assets	725	$ 515	1,027	$ 3,002
Equity-method investments	263		263		272
Total assets	23,744		23,744		23,149
Operating Segments [Member] | Northeast G And P [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Payments to Acquire Productive Assets	54	43	113	107
Equity-method investments	3,279		3,279		3,346
Total assets	12,727		12,727		12,918
Operating Segments [Member] | West [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Payments to Acquire Productive Assets	238	71	795	162
Equity-method investments	458		458		476
Total assets	12,753		12,753		12,144
Operating Segments [Member] | Gas & NGL Marketing Services
Segment Reporting, Asset Reconciling Item [Line Items]
Payments to Acquire Productive Assets	1	0	1	0
Equity-method investments	153		153		0
Total assets	188		188		46
Operating Segments [Member] | Reportable Segment, Aggregation before Other Operating Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Payments to Acquire Productive Assets	1,018	$ 629	1,936	$ 3,271
Equity-method investments	4,153		4,153		4,094
Total assets	$ 49,412		$ 49,412		$ 48,257